Electronic, structural and magnetic properties of CoFeVGe

Half-metallic Heusler alloys have attracted much attention due to their potential applications in spin-transport-based devices. We have synthesized one such predicted half-metal CoFeVGe using arc melting and high-vacuum annealing. The room temperature x-ray diffraction of the as-prepared sample exhibits cubic crystal structure without secondary phases. The sample shows a single magnetic transition at its Curie temperature of 249 K. The high field (3T) magnetization measured at room temperature is 41 emu/g. In this presentation, we will discuss effect of heat treatment on the structural and magnetic properties and also the results of our first principle calculation.